In a noisy environment, there goes your bandwidth. In a quiet environment, the wifi and the bluetooth networks won't even bother each other. But because of these techniques, they can coexist. So both try to actively prevent interfering with others and suffer data loss or speed loss for it. If it tries to use a channel(s) that is busy, from say wifi, then it will move on to the next and won't use those wifi channels, essentially not interfering. This is on top of it's normal frequency hopping. This may reduce the data speed for wifi if it has to wait too much.īluetooth for over a decade now uses adaptive frequency hopping (Bluetooth 1.2) so it will actively check each of it's channels to see if they are good or bad, and blacklists them for a while. If it tries to use a channel that is busy, from bluetooth, then it will wait.
If the channel is busy, it holds off transmitting. Wifi uses a listen before transmit system.
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